以南水北调中线安阳河倒虹吸节制闸为例,采用振型分解反应谱法,考虑流固耦合、启闭机室、工作桥、检修桥及交通桥对闸室振动特性的影响和地基的参振作用,分析了最危险方向地震和三向耦合地震激励下的振动特性及应力应变情况。结果表明,三向耦合地震能更准确地反映结构的地震响应;牛腿部位的抗震设计应考虑三向耦合地震的作用,其他部位仅考虑最不利方向的地震影响即能满足设计需要。 Taking the inverted siphon control gate of Anyang River in the middle of the South - to - North Water Diversion Project as an example, the influence of fluid - solid coupling, hoistway, working bridge, overhaul bridge and traffic bridge on the vibration characteristics of the lock chamber and the ground vibrations The vibration characteristics and stress-strain conditions of the most dangerous direction earthquake and three-way coupled earthquake are analyzed. The results show that the three-way coupled seismic can reflect the seismic response of the structure more accurately. The seismic design of the corbels should consider the effect of the three-direction coupled seismic. The other parts can meet the design requirements only considering the most unfavorable seismic effects.